Carriers can request MCT exceptions for connections onto a different carrier i.e. interline connections.
When the carrier sending in the proposed MCT exception is the receiving carrier, the MCT exception can be added to the Data Aggregators database immediately.
When the carrier sending in the proposed MCT exception is not the receiving carrier, the Data Aggregators must have approval from the receiving carrier before the MCT will be added.
* The receiving carrier, at the connect point, is the carrier whose flight the passenger is connecting to.